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ACCDE MDB
Not possible

Convert ACCDE to MDB

Can you convert ACCDE to MDB?
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Is it possible to convert ACCDE to MDB?
No - not a direct conversion.

Downgrading an ACCDE (ACE engine) to an MDB (Jet engine) is not possible. You would need the original .accdb first, then do accdb→mdb in Access, which is a separate supported step.

No direct path
Also to MDB: BTR · NPF · SDF

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Last verified Oct 2026

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Converting ACCDE to MDB

A .ACCDE file and a .MDB file hold different kinds of data, so there is no direct way to turn one into the other.

A full step-by-step guide for this conversion is on the way; the information above is drawn straight from our database.

About these formats

.ACCDE Microsoft Access Compiled Execute-Only Database

An ACCDE file is a compiled, execute-only version of a Microsoft Access database (.accdb) - all VBA source code has been permanently removed and design view is disabled. Open it with…

Open .ACCDE details →
.MDB Microsoft Access Database (97-2003, Jet engine)

An MDB file is a Microsoft Access database in the old format Access used from 1992 through 2003, replaced by .accdb in Access 2007. It stores tables, queries, forms, reports, and VBA code…

Open .MDB details →